v0.2.5
- Rename set_variable, get_variable-> send_variable, recv_variable: CoLearn-Dev/colink-sdk-rust-dev#55
- Add generate_token_with_signature; add test_user_management: CoLearn-Dev/colink-sdk-rust-dev#41
- Instant server error redirect, check mq connection before start: CoLearn-Dev/colink-sdk-rust-dev#40
- Fix instant server version: CoLearn-Dev/colink-sdk-rust-dev#51